package homework0309;

public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始");
        try {
            String line=null;
            System.out.println(line.length());
        }catch (NullPointerException e){
            System.out.println("发现空指针异常并解决");
        }

        System.out.println("程序结束");
    }
}
